LTC2634CUD-HZ12#PBF

Overview

The LTC2634CUD-HZ12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output and operates within a 4.5V to 5.5V supply range. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, a settling time of 4.8µs, and rail-to-rail output buffers. The unit is housed in a 16-lead 3mm × 3mm QFN package and includes power-on reset functionality that clears outputs to zero-scale upon initialization.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• SPI/MICROWIRE compatible 3-wire serial interface operating at 50MHz
• Rail-to-rail output buffers with guaranteed monotonicity over temperature
• Power-on reset circuitry clears outputs to zero-scale

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type, temperature grade, and reset behavior. Ensure the design supports the required 4.5V to 5.5V supply voltage for the H-grade variant. Confirm compliance with RoHS standards and automotive qualification requirements if applicable to the target application environment.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and low drift is required. The H-suffix indicates a 4.096V full-scale output necessitating a minimum 4.5V supply. The Z-suffix ensures outputs initialize to zero-scale, which is critical for safety in applications where downstream circuits are active during power-up. Verify that the 16-lead QFN package fits the available PCB footprint.

Part Context

This part belongs to the LTC2634 family, which offers various combinations of resolution (8, 10, or 12 bits), full-scale voltages (2.5V or 4.096V), and power-on reset behaviors. The CUD designation specifies the commercial temperature grade (0°C to 70°C) and the 16-lead QFN package format. Other variants in the series include MSOP packages and industrial/automotive temperature grades.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-LZ12#PBF for a 2.5V full-scale output or LTC2634IUD-HZ12#PBF for an extended industrial temperature range. Ensure any substitute maintains the 4.5V minimum supply requirement and zero-scale power-on reset characteristic.